Method of mixing gas-and foamproducing liquids

Claim 1

IN THE MANUFACTURE OF AN ALKYL BENZENE SULFONATE SALT DETERGENT, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY INTRODUCING A MIXTURE OF ALKYL BENZENE SULFONIC ACID AND SULFURIC ACID AND AN ALKALI-METAL CARBONATE SOLUTION IN PROPORTIONS CORRESPONDING TO BETWEEN 70% AND 85% OF THE ALKALI-METAL CARBONATE REQUIREMENT FOR COMPLETE NEUTRALIZATION TO A PH OF 7, INTO A CONFINED SPACE HAVING A CONSTRICTED OUTLET NEAR THE TOP THEREOF AND MIXING THE ACID MIXTURE AND CARBONATE SOLUTION THEREIN AT SUCH A RATE AS TO CAUSE A SUBSTANTIAL ELEVATION OF PRESSURE IN SAID SPACE AND VIOLENT AND CONTINUOUS EJECTION OF THE MIXTURE THROUGH SAID OUTLET AS A GEYSER OF BUBBLES INTO A ZONE OF LOWER PRESSURE, WHEREBY THE BUBBLES OF SAID GEYSER ARE CAUSED TO EXPAND AND RUPTURE, COLLECTING THE RESULTING LIQUID IN A